Tobacco smoke filter
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United States of America Patent
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-
Mar 26, 2013
Grant Date -
Jun 22, 2006
app pub date -
Nov 26, 2003
filing date -
Nov 27, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A tobacco smoke filter which gives an acceptable vapor phase filtration and flavor delivery in the presence of a volatile flavorant (e.g. menthol), the filter containing activated carbon in which (1) pores of under 2 nm pore diameter (micropores) provide a pore volume of at most 0.3 cm3/g (NZ); and (2) (a) pores of 2 to 50 nm pore diameter (mesopores) provide a pore volume of at least 0.25 cm3/g (N2) and/or (b) pores of 7 to 50 nm diameter (larger mesopores) provide a pore volume of at least 0.12 cm3/g (Hg).
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